Side-dump car



C. H. CLARK.

SIDE DUMP CAR APPLICAT4ION FILED SEPT-28, 191s.

Patented Jan. 17, 1922.

4 SHtETS-SHEET I.

INVENTOR Auk M WITNESSES c. H. CLARK.

SIDE DUMP CAR.

APPLICATION FILED SEPT.28, 191B.

Patented Jan. 17, 1922.

4 SHEETS-SHEET 2.

INVENTOR 'C. H. CLARK.

SIDE DUMP CAR.

APPLICATION FILED SEPT-28, I918.

1,403,843. Patented Jan. 17,1922.

4 $HLETSS HEET 3.

WITNESSES INVENTOR MQR I 4 x I I W C. H. CLARK.

SIDE DUMP'CAR. APPLIQATION FILED $EPT.28. 191B.

Patented Jan. 17, 1922.

4 SHEETS-SHEET 4- g. y iil ffw g UNITED STATES PATENT OFFICE.

CHARLES H. CLARK, OF DORMONT. PENNSYLVANIA, ASSIGNOR T0 CLARK CAR COMPANY, A CORPORATION OF PENNSYLVANIA.

SIDE-DUMP GAR.

Specification of Letters Patent.

Patented Jan. 17, 1922.

To allwhom it may comem: y Be it known that I, CHARLES H. CLARK, a' citizen of the United'State's, and a resident of- Dormont, in the county of Allegheny and State of Pennsylvania, have made a new and. useful invention inSide-Dumip Cars, of which thenfoll owing is a specification.

This inventionrelates to side dump cars and in thisapplication is illustrated in connection with a car of the type disclosed in application Serial No. 124,986 filed by me and Howard L. Beach on October 11, 1916 now Patent No. 1,333,293, granted March 9,1920. 1 a

An object of this invention is to provide a balanced rocker side dump car which will not only right itself without the application of external force but one in which the movements from dumped to upright position areso controlled that the righting is accomplished without undue shock.

A still further object is to provide a rocker side dump car in which the point of contact between the rocker and its mating rocker stand is retarded in its progression whereby the sum of the moments [tending to move the car to upright position are al- 1 ways somewhat in excess of those opposing such movement.

A still further object is to provide in side dump cars, a form of rocker and mating rocker stand adapted to-retard the acceleration of the falling load while in contact with the car whereby larger size units for standard age railway tracks may be built without the anger of the movement of the load dragging the car with it over the dump.

These, as well as other objects which will readily appear to those skilled in this particular art, I attain in the construction described in the specification and illustrated in the drawings accompanying and forming a part of this application, and throughout which similar elements are denoted by like character.

The cal-selected for illustration is of the gondola class and consists of a body, sides and under-frame or draft sill. The body which. carries the loadis supported by bolsters located adjacent the car ends and associatedwith each of these is a rocker and a mating rocker stand designed to allow the car to dum toward either side of the track and to t1 1: the body to the desired being arranged so that the sides swing through an angle of'90 degrees as the body swings through an angle of 40- degrees.

In this type of car the body is usually dumped by admitting air under pressure to telescopic dump cylinders located adjacent the ends of the car.

In the drawings, Figure l'is a View in cross section of a car embodying this invention showing one of the bolsters and one of. the rocker mechanisms in end elevation, Fig. 2 is a cross sectional view of said car taken at such a position as to show one set of the operating ,links and levers in end elevation. In both Figs. 1 and 2 the body and doors by dotted lines are shown in dumping position. Fig. 3 is an enlarged detail view of the rocker and its mating rocker stand used in the car embodying this invention. shown in end elevation and the rocker in sectional elevation. The position of the rocker when the car is in dumped position is also shown by dotted lines. Fig. 4 is a diagrammatic view of a car embodying this invention and indicates the retarding of the progression of the point of contact between one of the rockers and its mating rocker stand whereby the returning moments are always maintained somewhat in excess of the retarding moments.

Referring to the drawin s 10 designates the longitudinal center sill of the underirame and this extends from end to end of the car. The car body issupported adjacent each end by a bolster 11. provided at its center with a downwardly curved portion 12 to which arocker 13 is secured. The rocker 13 is adapted to roll on and to cooperate with a rocker stand or way 14 locatcd-on the upper side of an under-frame bolster 15.

In this view the rocker stand is The doors arev hinged throughout their length to the body under-frame below the floor level as shown'at 21. r

The door on the lowering side of the body "is adapted to automatically open during the tilting movement and toautomatically close during the righting movement. The mechanisms whereby the openin and closing is accomplished are preferab y the same as those illustrated and described in the application before mentioned and consist of a Y bell crank lever 22 fulcrumed at 23 to the under portion of the body frame. In normal osition, that-is with the body upright, the s ort arm of the lever is disposed downwardly while the longer arm extends outwardl toward the door. The long arm of the be 1 crank by means of a link 25 is connected to an arm 24 extending downwardly from the door, while the short arm of the bell crank by means of a link 26, latch in 27 and a link 28, connects with a brac et 29 secured to center-sill 10 of the underframe.

Latch hooks 30 are secured to actuating shafts 31 which extend longitudinally of the frame and are journaled in suitable bearings 32 formed in a bracket 33 secured.

to the under side of the center sill 10. The

latches .vhen swung outwardly are adapted to engage the extremities of latch pins 27 thereb lockin the car body against tilting. he latc hooks are yieldlngly held in engagement with t e latch pins by means of a spring 35 whic connects the lower ends of lever arms 36 carried by the actuating shafts.

The long arm of bell crank22carries an abutment or stop member 37 and link 25 carries a cooperating abutment or stop member 38. When the carbody is in normal or upright position these stop members abut, and the angles of their abutting faceswith relation to their major axes are such that pin 39, which forms the pivotal connection between the bell crank and link 25, lies below a line extending through the centers of pin 23 and a pin 40 which connects link 25 which the material is to be dumped are swung to release the latch pins on that side of the car and then the body, by the body tilting means (such as telescopic air cylincausingl the door on the downward'side to move t rough an angle of 90 degrees while the body moves through an angle of 40'.

As clearly shown in Fig. 3, the bearing surface 41 of the rocker is formed on the arc of a circle except that at its center 42 it is flattened for a distance on each side of the center line. The rocker stand is formed on each side of the center line so as to present three bearing surfaces, a center surface 43 which is horizontal, an intermediate surface 44 which stands at an angle to the center horizontal surface, and an outer surface 45 preferably parallel to the intermediate surface. An angular surface joins the outer and intermediate surfaces forming a shoulder or offset atthe inner end 46 of the outer surface, up over which the rocker rides as the car body is tilted. The extreme outerends of the rocker stand are inclined toward the sides of the car thus forming a bearing surface for the lower side of the car bo sters against which they rest when the body is in dumped position. The rocker stand 1s provided with upstanding gear teeth 47 adapted to re openings 48 formed in the rocker. The stand also has openin 49 for the reception of teeth 50 formed on the rocker meming rocker stand ro'vic'ed by the shoulder 46 in the stand a ords means for retarding the progression of the point of contact between the rocker and the rocker stand and by thus retarding the progression of said point of contact the returning moments are always maintained in; excess of the retarding moments. The flattened portion 42 at of travel and thereby insure a maintenance The offset between the ocker and its matister and mesh with of the excess of the returning moments over the retarding moments.

The 'eifect of suspending the progression of the point of contact at predetermined positions on therocker stand provides additional counter balance in the car body-moments adapted to offset the retardation of the door motion moments'at corresponding by means of the offset raised bearing surface 45 and of course "in rolling is moved-a dis-- ta'nce toward the side of dumping. -By rea-- son of this superelevated position of the body and the door on the upper side it is quite obvious that work has been done against.

gravity and the body and upper door therefore possess more potential energy when the car is in dumped position than when it is in upright position, (In the other hand the down turned side has been lowered with re spect to the body and therefore possesses less potential energy in the dumped position than in its upright position. By means of the'system of links and levers comprising the door operating mechanism and by means of the peculiar formation of the rocker rack or stand the various parts are slightly coun-.

ten-balanced in closing direction about the pomt of contact between the rocker and the rocker stand. Since the normal distance from the point of contact to the direction of force when multiplied by that force gives the moment of the force about the point of contact it follows that the moments of the closed side and body (without sides) tend to produce a counter-clockwise rotation of the body and are termed returning moments, while the moments of the down turned side and those of the latch hook links tend to produce a clockwise rotation andare termed retarding moments. In any position of dump from 40 to zero degree position the sum of all the returning moments on account of the peculiar contour of the rocker stand are greater than the sum of all the retarding moments so that the body after dumping will right itself without the aid of any external force and do this smoothly and without serious shock or injury to the car or mechanisms.

The fiat portion at the center of the rocker prevents the point of contact between the rocker and the rocker stand from approaching the center line closer than the distance from the center line to the edge of the flat part, and the impulse of the returning moment is increased by this retardation and is diagram clearly indicates the balancing-of the various parts about the selected points of contact between'the rocker and'the' rocker stand. During the closing movementsfrom an angle of 40 to 20-deg'rees of tilt theparts are balanced about points in bearing siirface 45 and from an angle of 20 degreesfto 6?; the various parts are I balanced about shoulder 46. When the car has arrived at the 6-3; degree position its supporting point remains'stationary until the lns tan't'of closing and locking the car.

Having thus described my invention what I claim is- 1. In a tilting, side dump car, a body, a rocker thereon, an underframe, a rocker stand thereon adapted to support. said body through said rocker, a pivotal point for said rocker on said stand and rolling tooth means to prevent displacement of said rocker when pivoting on said point.

2. In a car adapted to tilt from an upright position to dump its load, an underframe provided with a rocker stand, a tilting body provided with doors hinged thereto and with a rocker supported upon said rocker stand, said stand and rocker cooperating to provide a varying progression of the point of support of said body on said underframe during tilting of the body to and from a dumped position and adapted to maintain said point outside of the perpendicular through the center of gravity of said body and doors during other than upright position of same.

3. In a tilting, side dump car, an underframe, a body, side doors hlnged to said body, door operating mechanism connected to said doors and underframe and adapted, as said body is tilted, to cause the door on the lowering side to open and to close as said body returns to upright position,arocker and a rocker stand between said body and underframe adapted to intermittently delay the progress of the point of contact between said rocker and stand during movement of the body and having their delaying means coordinated with said door operating mechanism.

a. In a tilting body, dump car, a body, a rocker thereon, an underframe, a rocker stand thereon adapted to support said body through said rocker, a tooth on said rocker, a tooth on said stand, an opening in said rocker adapted to receive said stand tooth, an opening in said stand adapted to receive said rocker tooth, a point on said stand, adjacent said stand tooth, adapted to pivotally support said rocker at a point on the latter adjacent said rocker tooth, said teeth being adapted to engage when said point 1s functioning as described.

5. In a tilting body dump car, a body, a rocker secured thereto, and forming a support for the body, an underframe. a rocker stand forming a part of the under-frame and on which said rocker is mounted, said rocker stand having an edge adapted to be engaged by the rocker as the body is tilted and 1nter- "locking means provided on the rocker and rocker stand for preventing displacement of the rocker'while pivoting on said edge.

6. In a tilting body dump car, a body, a rocker secured thereto and having a curved bearing face-flattened at the centerline of the car,- an underframe, a, rocker stand forming a partof. the underframe and on which sand-rocker is mounted, said stand having 2f central horizontal portion adapted to be engaged by the central fiat portion of the tween the two bearing portions so located as to present a pivoting edge to the rocker, and means for preventing displacement of the rocker while pivoting about said edge.

In testimony whereof, I have hereunto subscribed my name this 26th dayof September, 1918. 1

CHARLES H. CLARK. 

